Hydraulic motor for wagon-dumps.



S. B. HART, W. B. WILDE & W. P. BROWN. HYDRAULIC MOTOR FOR WAGON DUMPS. APPLICATION FILED JULY 3.1911

1,098,498, Patented June 2,1914.

within the cylinder and to S'IAUY B. HART, WALTER. B. WILDIE,

INDIE, ASSlfiNGBS TU HART GEM Rhlfltlltl or ILLINOIS.

AND WALTER FRANK BROWN, Uh PEQEIA, liltilil- WEIGHER $0., 0E lEEORIA, ILLIN01$, A GORPU- HltDltt-h'ULlG MUTOLH. FOR WAGUN-DU'MPS.

ntense.

filpecillcation of letters talent.

Patented Juno 2, 1914..

Application tiled Italy 3, i911. Serial No. 636360.

To all whom it may concern Be it known that we, @TACY lB. llAliT,WAL- 'ren B. Wines, and "Warden FRANK Bnown, citizens of the llnited @tates, residing at Po oria, in the county ot Peoria and State of Illinois, have invented certain new and use: ful linprovements in Hydraulic Motors for WagodlDumps, of which the following is a specification.

Our invention relates to certain new and useful improvements in hydraulic motors for Wagon dumps.

The object of the invention is to provide hydraulic means tor raising the Wagon, means for controlling the movement of the piston with relation to a cylinder under all conditions that may arise in the use of the device; to dispose the pump substantially "enerally simplity the structure and minim ze the number 0t parts necessary to the building out the same.

"We have shown the device particularly associated with an overhead derrick; it may, however, be associated with other terms of dumps without departing from the principle involved in the structure disclosed.

Uur invention consists in the association ol" the parts in a relation to simplify the structure and to reduce the number of structural parts to the minimum.

()ur invention further consists in placing the pump within a liquid containing portion oi? the device.

Our invention turther consists in the association with liquid circulating parts of a three way control valve adapted in function toacpominodate varying conditions and (in cumstances oil use of the device tor dumping purposes.

@111 invention further consists in novel combinations and details of construction hereinafter more particularly set out.

Referring to the drawings,-l igure l is a perspective view oil a derrich dump showing our invention applied; Q is a vertical section oi a cylinder and pump, connections hetwecn the cylinder and pump, and valves and other means o'li' control; Fig. 3 is a vertical section showing the pump, control valves and certain pipe connections; l ig. l; a detail view of a valve. and Z3 is a the lower end sectionalview taken on the line 5-5 of Fig.

Uther features hereinafter specifically set out are new.

in the drawings, 2 is a cylinder, 3 a head or cap and t a gasket interposed therehetween. The head 3 is provided with a duct as 5 communicating with the upper portion of cylinder 2. lhis head is also provided with air chamber 6. y

7 refers generally to a casting designed to contaln the pump parts. This casting has an interior opening, the purpose of which is to provide for the proper seating of the pump and also to provide an auxiliary liquid containing chamber within which an cecentric l'or operating the pump may he placed. The upper portion of the casting is provided with otlset or shoulder 8 which forms the seat for partition 9, the latter being provided with opening 10 therein.

11 is a gasket positioned upon the upper wall of partition 9, upon which said gasket of cylinder 2 is adapted to be seated.

12 is an auxiliary chamber communicating with the interior of cylinder 2 and contains the-structural parts of an eccentric and its connections.

13 is a compensating chamber communicating with auxiliary chamber 12 through opening 13 1 lrel ers generally to a. pump which may be of any suitable type but as we are not claiming in this application any patentab-le novelty in the pump, detail description cl the same is omitted.

i5 is a valve normally seated in a suitably formed valve seat in the body ot' the casting.

16 is a coil spring and 1? is a set nut seated in the threaded opening in the bottom oi casting l adapted to induce a proper tension ot spring 16 upon valve l5.

l8 a three way valve seated in a suitable opening within casting 'l" and suitably held therein in a relation to permit the same to he turned by any suitahle means, as for in stance, lever '19.

90 is a central chamber or valve opening within valve 18 communicating with the pump and with ports a. and h in the valve.

21. is a hy-puss in the body oi. casting '5 Mill communicating with auxiliary chamber 12 and adapted for intermittent communication with the valve opening 2O through port 6.

22 is a tube communicating at its upper end with duct 5, the same being threaded for connection with a threaded opening entering said duct 5. The lower end of tube 22 communicates through duct 23 and port a with valve opening 20 and is threaded at its lower end for connection with an opening communicating with duct 23.

24 is a lu on casting 7, its functional adaptability ein to assist in the proper joining of the cy inder 2 with head 3 and castin 7. Sleeve nut 26 is supported in a threa ed connection in the opening leading to duct 23 and is interiorly threaded, to connect with the lower threaded end of tube 22.

25 is a nut carried on the threaded part of the lower end of, tube 22. Nuts 25- and 26 serve the purpose of properly drawing the cylinder 2, head 3 and casting 7 together.

27 is a tube communicating at its upper end with air chamber and at its lower end with compensating chamber 13, its ends being threaded to engage threaded openings in head 3, and casting 7, to facilitate the drawing and the holding of the parts together.

28 is a piston rod and 29 a piston head adapted to reciprocate within cylinder 2.

The cylinder, auxiliary chamber and all intercommunicating connections are adapted to be filled with liquid, preferably oil.

In the operation of the device, and at the beginning of the raising movement, valve 7 18 is turned into a position so that the opening 20 therein will communicate with tube 22, then the pump being in operation will force the liquid into the cylinder above the piston head, forcing it downwardly, which action, through the connection of extension 30 of the piston rod with ropes 31 of the dump derrick will cause the latter to be drawn downwardly and through the action of the loops thereon engaging the hubs of the wheel, the wagon will be raised. We do not consider it necessary to describe in detail the connection with the derrick, as such structural connections are old and constitute no part of this invention, except in the combination employed. When the piston has reached the limit of its downward movement necessary to raise the wagon 'to the desired height, the valve 18 may be turned to a position in which port F) communicates with by-pass 21 and closes port a, in which position the piston'will be held against upward movement, thus sustaining the wagon in a fixed position. During the time the wagon is held in this fixed position the liquid discharged from the pump will pass through valve opening 20, port I; and by-pass 21 bacl; into auxiliary chamber 12. When it is desired to lower the wagon, valve 18 may be turned so that ports a and b therein will register throughout a portion of the capacity of said ports with by-pass 21 andduct 23. Under such condition of adjustmentof the valve, the weight of the wagon will cause piston head 29 to be drawn upwardly, ex-

pelling the liquid from the upper portion of cylinder 2, the escape thereof being efi'ected through the communicating connection back to auxiliary chamber 12, and likewise into the cylinder below the piston head. During thislowering movement, the discharge from the pump Wlll be into valve opening 20 and into by-pass 21 into auxiliary chamber 12, the capacity of byass 21 being sufficient to accommodate the ual flow of liquid from the upper portion of the cylinder andthe pump.

The upward or downward movement of the wagon may be stopped at any point by simple manipulation of the valve 18. The

at the will of the operator by manipulation ,of this same valve so as to increase or diminish the relative flow through the respective ports a and Z2. For instance, if the wagon is moving upwardly too rapidly, a

turning of valve 18 to partially close the communicating opening from port a into duct 23 and causing a degree of opening and communication between port 6 and by-pass 21 will diminish the quantity of liquid passing through duct 23, and the excess of llquid will pass through by-pass 21 back into the auxiliary chamber. The speed in any direction of movement of the piston head may always be regulated by the manipulation of the valve to proportion the flow through respective ports a and 7;.

Chamber 13 and tube 27 are provided to compensate for the displacement occasioned by piston rod 28 as it is projected into cylinder 2. The complete area of cylinder 2 and its communicating connections being filled with liquid, when the piston head is at its most elevated position it follows that as the piston rod 28 is projected into the cylinder the liquid, in proportion to the displacement, will be forced through opening 13 into compensating chamber 13 and upward into tube 27, proportionately as the piston rod is projected within the cylinder. Upon a reverse movement of the piston head, the liquid from tube 27 and chamber 13 will flow back into the auxiliary chamber 12. I

A compensating displacement chamber as sociated with hydraulic jacks is not new in principle and therefore we make no claim broadly therefor and claim in our structure only the new feature of utilizing tube 27 as a portion of the compensating chamber, and also as a means, in conjunction with tube 22 which likewise performs a double function, for holding the parts together.

antenna We have shown herein one form of construction of our device. However, may be difierently constructed and the principle thereof applied in different forms without departing from the spirit of the invention, therefore, we desire to claim all terms and structural combinations falling within the principle of the same.

What we claim is 1. ln combination with a hydraulic cylinder provided with an inlet above the piston head and an outlet below the same, and with aby-pass intermediate the inlet and the out let communicating with the cylinder below the piston, ot a valve having an interior opening communicating with the outlet and with ports disposed relatively to communieating means with the cylinder above the piston and with a bypass so that the shitting valve may establish communication or shut it off so that when there is a flow in one, the other port is closed, or may be turned to permit a partial flow into each.

2. in combination, a hydraulic cylinder, a piston therein, a pump connected with the lower end 01' the cylinder, an outlet "for the cylinder below the piston head through the pump, an inlet to the-cylinder above the piston head, a bypass between the outlet and inlet into the cylinder communicating with the same below the piston head, a valve communicating with the discharge outlet of the pump and with the cylinder above the piston head and with the bypass, and provided with ports to completely or partially open and close communication with the cylinder above the pump and with the by-pass or to permit a simultaneous flow through each, means under the control of the operator for turning the valve to accomplish its several purposes.

3. ln combination, a hydraulic cylinder, a piston therein, an auxiliary cylinder cham ber communicating with the lower portion thereof, both cylinders adapted to contain liquid as oil, a pump within the auxiliary chamber, the working parts immersed in the liquid contained therein, a tube communi- .-,ating with the cylinder above the piston head, a by-pass between the discharge outlot from the pump and the tube connection with the cylinder above the piston head, a valve provided with an interior opening communicating continuously with the discharge openin from the pump and both alternately ancl simultaneously according to manipulation, through suitable ports with the tube and theby-pass.

4-. In combination, a main cylinder, at piston therein, an auxiliary cylinder communieating with the main cylinder below the piston head and forming substantially a con tinuation thereof, said auxiliary cylinder having a depending portion adapted to carry pump parts, a pump carried within the aur ire iliary cylinder and the extension therefrom, a discharge outlet from the pump, a tube communicating with the cylinder above the piston head, a bypass disposed between the inlet of the tube and the discharge opening from the pump, a valve supported in the extension from the auxiliary cylinder in a relation to communicate permanently with the discharge opening from the pump and both intermittently and continuously with the tube and the bypass, and means for effecting the movement of the valve to accomplish the several functions named.

5. ln combinatioma main cylinder, a piston therein, an auxiliary cylinder communicating with the main cylinder below the piston head and forming substantially a continuation thereof, said auxiliary cylinder having a depending port on adapted to carry pump parts, a pump carried within the auxiliary chamber and the extension therefrom, a discharge outlet from the pump, a tube communicating with the cylinder above the piston head, a by-pass dispose between the inlet of the tube and the discharge opening from the pump, a valve formed with an in terior opening communicating continuously with the discharge opening from the pump and provided with circumterentially elongated ports arranged in different planes but portions of each ort lying in the same plane, said ports a apted to register respectively with a communicating connection with the tube and with the bypass for the purpose of ell'ecting through manipulation of the valve, a communication or cut-0d respectively with each the tube and the bypass or to permit simultaneously an interflow through each, and means for operating the valve to accomplish the functions specified.

6. ln combination, a cylinder, a piston operatively connected therewith, a chambered extension communicating with the lower end of the cylinder and valves within said extension, pump parts comprising a shaft, an eccentric and plunger within said extension; a duct communicating with the cylinder .above the piston head, a by-pass interposed between said duct and the discharge opening from the pump and a valve interposed between the duct communicating with the cylinder above the piston and with the discharge outlet from the pump and with the bypass at a point intermediate the tube and the pump discharge outlet, the communicating openings from the valve relatively to the pump, the by-pass and the duct to be such that there shall be a continuous inflow from the pump to the valve and both an alternate and. a simultaneous communication to the duct and the by-pass according to the position of the valve, and means for manipulating the valve to establish such communication respectively with the duct and with the toy-pass as specified.

lllti lllll lilo 7. In combination, a cylinder, a piston operatively connected therewith, a chambered extension communicating with the lower end of the cylinderand valves within said extension, pump parts comprising a shaft, an eccentric and plunger within said extension; a duct communicating with the cylinder above the piston head, a by-pass interposed between said duct and the discharge opening from the pump, and a valve interposed between the duct communicating with the cylinder above the piston and with the discharge outlet from the pump and with the bypass at a point intermediate the tube and the pump discharge outlet, formed with an interior opening having a permanent communication with the pump outlet and provided with ports arranged relatively in different planes but portions of each lying within the same plane, said ports adapted to communicate respectively with the tube and the.by-pass so that each may be closed or opened alternately or each may be partially opened so as to permit a simultaneous fiow through each.

8. In combination, a cylinder, a piston operatively connected therewith, a chambered extension communicating with the lower end of the cylinder and valves within said extension, pump parts "comprising a shaft, an eccentric and plunger within said extension; a duct communicating-with the cylinder above the piston head, a by-pass interposed between said duct and the discharge opening from the pump and a valve interposed between the pump outlet and the duct provided with a communicating opening therein from the former to the latter and with the by-pass at an intermediate point, the communication from the" pump with the valve 'being continuous and with the.

duct and by-pass both alternate and simultaneous, whereby the flow may be from the pump to the valve and tube to the cylinder above the piston head while the by-pass is closed or from the pump through the bypass into the auxiliary cylinder while communication with the tube and the cylinder above the piston head is closed or from the pump through the by-pass and from the tube and cylinder portion above the piston head through the by-pass simultaneously.

9. In combination, a hydraulic cylinder, a piston therein, a pump communicating with the cylinder at one end and communicating from the pump with the other end of said cylinder, a by-pass interposed between the pump and the end or" the cylinder at which the raising force is applied and communil eating with that portion of the cylinder, and

a valve interposed between the pump, the by-pass and the portion of the cylinder where the power is applied to effect the raising movement provided with an interior opening communicating continuously with the pump and'both alternately and simulta neously with the by-pass and the connection with the cylinder to apply the raising force, and means for't'urning the valve to effect the several functions specified.

10. In combination, a hydraulic cylinder, a piston therein, a pump communicating with the ,cylinder at one end and communicating from the pump with the other end of said cylinder, a bypass-interposed between the pump and the end of the cylinder at which the raising force is applied and communicating with that portion of the cylinder, and a valve interposed between the pump, the by-pass and theportion oft-he cylinder where the power is applied to effectthe raising movement, formed with an interior opening communicating continuously with the pump and with ports opening out therefrom arranged relatively in difl'erent planes but portions of each lying in the same plane adapted respectively to'register with the communicating means to the portion of the cylinder where it applies the power to effect the raising and with the bypass and'in a relation that by the manipulation of the valve communication with the cylinder may be established when the bypass is cut off or communication may be established with the by-p-ass and communication with the cylinder cut 05 or an interflow from the cylinder to the by-pass and from the pump to the by-pass may be simultaneously established.

11.- ln combination with a hydraulic cyl-' inder, of an auxiliary chamber communicating therewith provided with an extension adapted to carry pump parts, a shaft carried through the extension, eccentric parts supported thereon, a pump actuated by the eccentric, means connecting the discharge opening from the pump wit-h the auxiliary chamber and with the upper portion of the cylinder, and means for controlling the interflow of liquid therebetween. I

12. In combination with a hydraulic cyl inder of an auxiliary chamber communicating therewith provided with an extension adapted to carry pump parts, a shaft carried through the extension, eccentric parts supported thereon, a pump actuated by the eccentric, a duct adapted for communication between the pump and the portion of the cylinder above the piston head, a by-pass disposed between the outlet from the pump and said duct adapted for communication with the cylinder below the piston head, and a valve adapted to control the interflow between the pump and the cylinder above and below the'piston head.

13. in combination with a container adapted to be filled with oil, comprising a cylinder and a communicating chambered extension, of a piston and piston rod within the cylinder, a pump, and means for com- P p eccentric and noeesiea munication between the pump parts within the liquid container and immersed in liquid therein,-and the cylinder above and below the piston.-

lt. lin combination, a liquid container comprising a cylinder and a communicating chambered extension, a piston and piston rod, pump parts comprising a drive shaft,- eccentric and plunger supported within the chamber immersed in the liquid, and means for communication between the pump and the cylinder above and below the piston.

1 5. ln' combination, a liquid container comprising a cylinder and a communicating chambered extension, a piston in the cylinder, pump par-ts within the liquid container, a discharge outlet from the pump,

'means connecting the discharge opening and a valve, a pump within the auxiliary chamber and-the extension therefrom, a discharge outlet from the pump, means conmeeting the discharge outlet to the cylinder aboveand below the iston head, a valve for controlling the inter ow therebetween and a compensatlng chamber adapted to take up the excess liquid displaced by the projection oi the piston rod within the cylinder comrising a tube communicating with thecylinder through the auxiliary chamber. l7. ln'combination, a cylinder, a piston and piston rod therein, a liquid container, arts comprising a drive shaft, an

lunger supported and immersed in the maid within the liquid container, a discharge outlet trom'the pump, means connecting the discharge outlet with the cylinder above and below the piston a valve tor controlling the interflow there etween, means for actuating the valve, and a compensating duct communicating with the cylinder below the iston head adapted to take up the excess iq'uid' displaced by the projection of the pistonr od within the cylinder.

18. In combination, a cylinder adapted to be filled with liquid an auxiliary chamber formed with flanged parts adapted to be seated in conjunction withthe lower portion of the cylinder and an extension therefrom adapted to carry pump parts and a valve, a bypass formed in said extension, a pump and discharge opening therefrom, a tube communicating with the duct inlet into the cylinder above the piston and connected with the extension from the auxiliary chamber and adapted for communication with the discharge outlet from the pump, a valve communicating with the discharge outlet from the pump, with the by-pass and with the tube communicatin with the cylinder above the piston hea a tube having a threaded connection with the cap-and come municating with the air'chamber' therein, and having a threaded connection with the auxiliary chamber and also a liquid communicatmg connection therewith.

19. In combination, a cylinder adapted to be filled with liquid, a closure head therefor, a piston therein adapted to be reciprocated under pump pressure in one direction, an auxiliary chamber, means for connecting the cylinder, the head and the auxiliary chamber' comprising tubes and means for establishing communication through said tubes between the portions of the cylinder above and below the piston head, and means for taking up the excess liquid displaced by the projection of the piston rod wlthin the c 1- inder communicatlng with the said cylin or below the piston head, the said tubes constituting the same means that are employed to establish communication as set forth,

In testimony thereof we have affixed our signatures in resence of two witnesses.

S'I AGY B. HART. WALTER B. WILDE. WALTER FRANK BROWN.

Witnesses:

CLARA Tires,

LOGAN COLLYER. 

